BRACHIOPODA, 
6. MAGAS. 
Shell with a reflected loop attached near the bend to a very 
prominent central septum (figs. 9-12). 
Magas, Sowerby, 1816, Min. Con. ii. p. 39. t. 119. 
Dav. 1852, Mon. Cret. p. 19; Ann. Nat. Hist. 1852, p. 371. 
D’Orh. Ter. Cret. 1847, iv. p. 54. 
Terebratulee spiriferinse (part.), Quenst. Handh. p. 476. 
Terebratula, E. 1, Blainv. Man. Malac. p. 512. 
Figs. 9 & 10. Magas pumila. 
Fig. 9. Fig. 10. 
Fig. 9. — Interior of dorsal valve. 
Fig. 10. — Section of both valves : s, septum ; 1. loop ; o. oral processes. 
*rigs. 11 & 12. Magas Evansii. 
Fig. 11. Fig. 12. 
Fig. 11. — Section of dorsal valve. Fig. 12. — Front view of interior. 
In ill. pumila the reflected portions of the loop are not united, 
and the deltidium consists of two narrow plates bordering the 
angular foramen. 
1. Magas crenulata. 
Shell suborbicular, pale hom-colour, with radiating ribs ; mar- 
gins crenulated ; beak short, shghtly reflected ; hinge-area large 
and flattened ; foramen large, nearly complete ; deltidia large. 
